| Farmland nutrient and biodiversity of AM fungi in Nanniwan wetland in Northern Shaanxi |
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| DOI：10.7606/j.issn.1000-7601.2017.04.26 |
| Key Words: wetland farmland nutrient AM fungi |
| Author Name | Affiliation | | SHAN Bao-qin | School of Petroleum Engineering and Environmental Engineering, Yan'an University, Yan'an, Shaanxi 716000, China | | QIAO Yi-yi | School of Petroleum Engineering and Environmental Engineering, Yan'an University, Yan'an, Shaanxi 716000, China | | LIU Guo-hao | School of Petroleum Engineering and Environmental Engineering, Yan'an University, Yan'an, Shaanxi 716000, China | | XIANG Mei | School of Petroleum Engineering and Environmental Engineering, Yan'an University, Yan'an, Shaanxi 716000, China |
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| Abstract: |
| Wetland is invaluable natural resource, especially in Northern Shaanxi known as serious water loss and soil erosion areas of the loess plateau. Soil samples from seven agrotypes were selected and collected in Nanniwan wetland in Northern Shaanxi, China, aiming to research farmland nutrient concentration and biodiversity of Arbuscular mycorrhiza fungi, and thereby presenting suggestions for local agriculture development. The soil samples were collected from a depth of 30 cm into 3 sections, i.e. 0～10, 10～20 cm and 20～30 cm in the different farmlands in 2015. The spore density and biodiversity of AM fungi were measured. The result showed that at the 0～30 cm soil layer, the concentration of organic matter ranged from 7.54 g·kg-1 to 17.23 g·kg-1, organic matter in vegetable site was significantly higher than that in other layers. The concentration of available nitrogen ranged from 12.01 mg·kg-1 to 27.10 mg·kg-1. The concentration of available phosphorus ranged from 3.08 mg·kg-1 to 9.67 mg·kg-1, and the lowest value was detected in soil sample of Picea asperata. The concentration of available potassium ranged from 98.61 mg·kg-1 to 152.51 mg·kg-1. 10 AM fungi taxa in three g
enera were isolated and identified, of which 60% belonged to the genus Glomus, 30% to Acaulospora, and 10% to Scutellospora. The most abundance of AM fungi was found in the forest, second most in the field of Picea asperata, and the lowest in paddy field. The spore density showed significant differences among sites, with an order of forest soil (2.24·g-1), Picea asperata soil (2.18·g-1), millet soil (1.46·g-1), maize soil (1.31·g-1), vegetable soil (0.76·g-1), paddy soil (0.73·g-1), and soybean soil (0.68·g-1)。 |
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